Operation Manual

<Cause> Cannot detect home position.
<Suspected parts> Carriage unit, carriage belt,
carriage cable, carriage shaft,
guide rail, idler pulley, logic board
<Measure> 1. See Print Position Correction Error (page 5-17).
<Cause> Cleaning not performed normally.
<Suspected parts> Purge unit, purge sensor,
purge sensor cable,
paper feed motor drive transmission
gear, logic board
<Measure>
Part 5: Maintenance
BJC-7100
5-18
2. Home Position
Error
Beeper: 8 times
ERROR indicator: Blinks 3 times
3. Purge Error
Beeper: 8 times
ERROR indicator: Blinks 4 times
• Check the connection of the purge sensor cable connector (purge
sensor and logic board ends), and the conductivity of the joint cable.
Check purge sensor cable.
OK?
Check purge sensor.
Check purge unit
operation.
Check and service platen
paper feed motor drive
transmission gear.
OK?
OK?
Service/replace
the purge unit.
Reconnect/replace
purge sensor cable.
No
Yes
Yes
No
Yes
No
• With the power ON, remove the purge
unit and manually rotate the drive gear
to open and close the sensor, and check
the measuring point.
Measuring point
IC1 (MPU)
Pin No. 27
Sensor
Open
Closed
Normal value
Low level
High level
• With the purge unit removed, manually rotate the drive gear in
both directions to check that it moves smoothly.
Replace purge sensor.